JP2020060201A - gasket - Google Patents

Abstract

To provide a gasket which is space-saving, and which can be stably installed between two members to be sealed.SOLUTION: A gasket is interposed in a compressed state between a first member 2 and a second member 3 integrated with each other. An annular body portion 6 is included, which is clipped between a planar first surface 21a of the first member 2 and a planar second surface 31a of the second member 3. On at least one 6b of surfaces opposite to the first surface 21a and the second surface 31a in the body portion 6, a seal portion 7 elastically contacted with the first surface 21a or the second surface 31a is provided over the whole circumference of the body portion 6. On outer peripheral side of the body portion 6, a color holding portion 10 for holding a collar 13 is integrally provided so as to project out in a width direction of the body portion. The collar holding portion 10 is composed of a through-hole 11 and a peripheral edge portion 12 surrounding the through-hole 11.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a gasket, for example, a gasket used for a case that accommodates a battery pack for an automobile.

  The case for accommodating the battery pack as described above includes a box-shaped case body and a lid that closes the opening of the case body. A flange portion is provided on the peripheral portion of the case main body and the peripheral portion of the lid body, an annular gasket is interposed between both flange portions, and both flange portions are tightened by bolts and nuts to connect the inside of the case. The space is sealed to prevent rainwater and the like from entering the internal space (see, for example, Patent Document 1). The gasket shown in Patent Document 1 is provided with a collar mounting portion for defining the fastening height when fastening with bolts and nuts. Further, in FIGS. 1 to 3 of Patent Document 2, a reinforcing rod made of a material harder than the gasket is connected along the outer peripheral side of an annular gasket, and a positioning hole formed in the reinforcing rod is covered with a cover. An example is shown in which a collar for inserting a bolt for defining a fastening height when fastening a member and a mating member is embedded.

Patent No. 5760411 JP 2000-130591 A

  By the way, in the gasket shown in Patent Document 1, the mounting portion of the collar is provided at a position along the seal line of the gasket. An annular seal portion is provided around the mounting portion of the collar, and two lip-shaped projections having a sealing function are provided over the entire circumference of the gasket continuously from the annular seal portion. Therefore, unless the annular seal portion around the collar mounting portion and the lip-shaped projection are completely connected, the sealing function is deteriorated. Further, there is a concern that the total width of the gasket over the entire circumference becomes large, and it is difficult to apply the gasket when the gasket installation space (flange width) is small. In addition, in the case of the gasket shown in FIGS. 1 to 3 of Patent Document 2, the gasket is cumbersome to prepare because it is composed of two members of a gasket and a reinforcing rod made of different materials. The total width of the reinforcing rod over the entire circumference becomes large, and the installation space for the gasket and the reinforcing rod is restricted.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a gasket that is space-saving and can be stably mounted between two members to be sealed.

  A gasket according to the present invention is a gasket interposed in a compressed state between a first member and a second member that are united with each other, wherein the first surface of the first member has a plane shape and the flat surface of the second member. An annular main body sandwiched between second shaped surfaces, wherein at least one of the surfaces of the main body facing the first surface and the second surface has the first surface or the second surface. A seal portion that makes elastic contact is provided over the entire circumference of the main body portion, and a collar holding portion for holding a collar is integrally provided on the outer peripheral side of the main body portion so as to project in the width direction of the main body portion. The collar holding portion is formed of a through hole and a peripheral edge portion surrounding the through hole.

  According to the gasket of the present invention, since the seal portion is provided over the entire circumference of the main body portion independently of the collar holding portion, the sealing function is stably exhibited, and the collar holding portion is provided outside the seal portion. Therefore, it is not necessary to provide a seal function part around the collar holding part. With this structure, the total width of the gasket as a whole circumference can be reduced, which saves space. Further, since the collar holding portion is integrally provided in the main body portion, the first member and the second member are assembled by inserting and fastening a fastening member such as a bolt in the collar with the gasket interposed. In this case, the mounting property of the gasket is improved.

In the gasket of the present invention, the planar shape of the opening of the through hole may be an elliptical shape whose major axis extends along the circumferential direction of the main body.
According to this, since the planar shape of the opening of the through hole is the elliptical shape whose major axis is along the circumferential direction of the main body, the protrusion width of the collar holding section from the main body can be reduced. As a result, space saving is more effectively performed.
In this case, the elliptical shape of the through hole has a shape in which the short axis is along the width direction orthogonal to the circumferential direction of the main body, and the width of the peripheral portion on the short axis side is smaller than the width on the long axis side. It may be said that.
According to this, since the width of the peripheral portion on the short axis side is smaller than the width on the long axis side, it is possible to further reduce the projecting width of the collar holding portion from the main body portion. Space can be made more effective. Further, since the width of the peripheral portion on the minor axis side is smaller than the width on the major axis side, when the collar is inserted into the through hole of the collar holding portion, the portion of the peripheral portion on the minor axis side has an elliptical shape. It is easy to extend in the circumferential direction, and it is possible to prevent the protrusion width of the collar holding portion from the main body side portion from increasing due to collar insertion.

In the gasket of the present invention, a plurality of the collar holding portions may be provided at intervals in the circumferential direction of the main body portion.
According to this, the gasket can be interposed between the first member and the second member in a substantially uniformly compressed state over the entire circumference, and the sealing function can be made uniform.

In the gasket of the present invention, a collar made of a metal ring may be inserted and held in the collar holding portion.
According to this, since the collar made of the metal ring is held by the collar holding portion, excessive fastening at the time of fastening is prevented, and deformation due to fastening of the first member or the second member is prevented.

In the gasket of the present invention, the collar holding portion may be provided with a positioning protrusion that is inserted into a hole formed in the first surface or the second surface.
According to this, the gasket is properly interposed between the first member and the second member at a predetermined position, the assembling property of the first member and the second member is improved, and the mounting property of the gasket is further improved. To do.
In this case, a portion of the collar holding portion on the main body portion side of the peripheral portion may be formed wide, and the positioning protrusion may be provided in the wide portion.
According to this, the influence of the deformation of the through hole due to the insertion of the collar is less likely to occur, and the displacement of the positioning protrusion due to this deformation can be prevented.

  According to the gasket of the present invention, it is possible to stably install between the two members to be sealed while saving space.

1 is an overall plan view showing a first embodiment of a gasket according to the present invention. It is an enlarged view of the A section in FIG. FIG. 3 is a sectional view taken along line BB in FIG. 2. It is CC sectional view taken on the line in FIG. It is a figure similar to FIG. 2 which shows the modification of the embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 4 show an example in which the first embodiment of the gasket according to the present invention is applied to a case 1 that accommodates a battery pack (not shown) for an automobile. The case 1 includes a box-shaped case body (first member) 2 having an open top, and a lid (second member) 3 that covers the opening of the case body 2. Both the case body 2 and the lid body 3 are made of metal, and flange portions 21 and 31 are formed on the peripheral portions thereof. By interposing the gasket 5 between the flange portions 21 and 31 and fastening the fastening member 4 (the bolt 41 and the nut 42), the flange portions 21 and 31 are united with each other. The two merged surfaces of the flange portions 21 and 31 are the first surface 21a and the second surface 31a, both of which have a planar shape.

The gasket 5 is formed of an elastic body such as rubber and includes an annular main body portion 6, and the basic shape of the cross section of the main body portion 6 is a vertically long rectangular shape. Of the surfaces (hereinafter, referred to as facing surfaces) 6a and 6b that face the first surface 21a of the case body 2 and the second surface 31a of the lid 3 at the time of fastening the body portion 6, the lower facing surface. 6a faces the first surface 21a of the case body 2, and the upper facing surface 6b of the body portion 6 faces the second surface 31a of the lid 3. In the present embodiment, on the upper facing surface 6b, which is one of the facing surfaces 6a and 6b, a seal portion (hereinafter, referred to as a first seal portion) 7 formed of a ridge body that elastically contacts the second surface 31a is provided. It is provided over the entire circumference of 6. Further, on the lower facing surface 6a, which is the other of the facing surfaces 6a and 6b, a seal portion (hereinafter, referred to as a second seal portion) 8 formed of a ridge elastically contacting the first surface 21a is provided on the main body portion 6. It is provided all around. A recessed groove 7a is formed in the central portion of the first seal portion 7 in the width direction and extends over the entire circumference of the main body portion 6, whereby the seal portion 7 is divided into two sections. Further, a concave groove 8a is formed in the central portion in the width direction of the second seal portion 8 over the entire circumference of the main body portion 6, whereby the seal portion 8 is also divided into two sections. In this embodiment, the entire surface of the first seal portion 7 including the concave groove 7a is the facing surface 6b, and the entire surface of the second seal portion 8 including the concave groove 8a is the facing surface 6a.
In addition, although the shape of the tip end portion of the ridge body forming the first seal portion 7 and the second seal portion 8 is flat in the present embodiment, it may be rounded or pointed in a mountain shape. Good. In addition, in the present embodiment, the first seal portion 7 and the second seal portion 8 are divided into two lines by the concave grooves 7a and 8a, but a ridge body having no concave groove is also applicable.

  Further, on the outer peripheral side of the annular main body portion 6, that is, on the outer (annular outer) side surface 6d of the inner and outer both side surfaces 6c and 6d, the side surface 6d is orthogonal to the circumferential direction a of the main body portion 6. A collar holding portion 10 that projects in the width direction b is provided. A plurality of the collar holding portions 10 are provided at intervals in the circumferential direction a of the body portion 6. The collar holding portion 10 includes a through hole 11 and a peripheral edge portion 12 surrounding the through hole 11, and is integrally molded with the main body portion 6. In the present embodiment, the planar shape of the opening 11 a in the through hole 11 is an elliptical shape whose major axis is along the circumferential direction a of the body 6. Further, the elliptical shape of the through hole 11 is a shape whose short axis extends along the width direction b orthogonal to the circumferential direction a of the main body portion 6, and the width d1 of the peripheral edge portion 12 on the short axis side is on the long axis side. It is smaller than the width d2. The elliptical shape of the present embodiment is line-symmetrical with the major axis and the minor axis as axes of symmetry. A collar 13 made of a metal ring is inserted and held in the collar holding portion 10. FIG. 3 shows a state in which the collar 13 is inserted and held in the collar holding portion 10 by press fitting. Further, the through hole 11 of the collar holding portion 10 has a step portion 11b on the side of the opening 11a, while the collar 13 has an outward flange portion 13b on the upper end side. In a state where the collar 13 is inserted and held in the through hole 11, the outward flange portion 13b of the collar 13 is locked to the step portion 11b of the through hole 11. Further, the height dimension of the collar holding portion 10 is smaller than the height dimension of the collar 13, and when the collar 13 is inserted and held in the through hole 11, the lower end portion side of the collar 13 is positioned below the collar holding portion 10. It is configured to project. Thereby, when the gasket 5 is interposed between the flange portions 21 and 31a and is compressed by fastening the fastening member 4, a part of the collar holding portion 10 is caught between the collar 13 and the flange portion 21. Is prevented.

Further, in the present embodiment, the collar holding portion 10 is provided with the positioning protrusion 14 that is inserted into the hole 21b formed in the first surface 21a (flange portion 21) of the case body 2. In the portion of the peripheral portion 12 of the collar holding portion 10 on the body portion 6 side, both side portions along the circumferential direction a of the body portion 6 are formed wide. The positioning protrusion 14 is formed on the lower surface of the wide portions 12a, 12a on both sides of each of the collar holding portions 10 so as to face downward toward the first surface 21a.
In addition, in this embodiment, each of the collar holding portions 10 is provided with two positioning protrusions 14, but the number may be one. Further, the positioning protrusion 14 may be formed to face the second surface 31a side of the lid body 3. In this case, the second surface 31a is provided with a hole into which the positioning protrusion can be inserted.

An explanation will be given of the procedure for forming the sealing structure of the case 1 using the gasket 5 configured as described above. First, the gasket 5 having the collar 13 inserted and held in the through hole 11 of the collar holding portion 10 by press fitting is arranged on the flange portion 21 of the case body 2. At this time, the positioning protrusions 14 provided on each of the collar holding portions 10 are inserted into the holes 21b formed in the flange portion 21 of the case body 2 for positioning. Next, the lid body 3 is arranged so that the flange portion 31 thereof rides on the main body portion 6. Then, the shaft portion of the bolt 41 of the fastening member 4 is inserted through the bolt insertion hole 31b formed in the flange portion 31, the inner cylindrical portion 13a of the collar 13 and the bolt insertion hole 21c formed in the flange portion 21, and the bolt 41 And the nut 42 are fastened. By fastening the bolt 41 and the nut 42, the gasket 5 is sandwiched between the first surface 21a of the flange portion 21 and the second surface 31a of the flange portion 31, and interposed between the case body 2 and the lid body 3 in a compressed state. To be done. As a result, the internal space of the case 1, which is composed of the case body 2 and the lid 3, is sealed. Therefore, intrusion of rainwater or the like from the outside into the internal space is prevented, and there is no concern that the contained battery pack will be exposed to rainwater or the like and suffer adverse effects such as corrosion. Further, due to the presence of the collar 13, the fastening by the fastening member 4 does not become excessive, thereby preventing an increase in the compression reaction force of the gasket 5 and suppressing the deformation of the flange portions 21 and 31. .
The arrangement of the gasket 5 on the flange portion 21 is located closer to the outside than the inner peripheral edge portion 21d of the flange portion 21 in FIGS. 3 and 4, but the inner side surface 6c of the main body portion 6 is located at this inner peripheral edge portion. You may set up along 21d. According to this structure, the entire circumference of the gasket 5 is shortened and the compression reaction force is further reduced.

  Further, since the collar holding portion 10 is provided so as to project from the outer side surface 6d of the body portion 6 in the width direction b of the body portion 6, the first seal portion 7 and the second seal portion 8 include the collar holding portion 10. Is considered to be an independent state. Therefore, the sealing function of the first seal portion 7 and the second seal portion 8 provided over the entire circumference of the main body portion 6 is stably exhibited. Moreover, since the collar holding portion 10 is provided outside the first seal portion 7 and the second seal portion 8, it is not necessary to provide a seal function portion around the collar holding portion 10. With this structure, the total width of the gasket 5 over the entire circumference can be reduced, which saves space. Further, since the collar holding portion 10 is integrally provided on the main body portion 6, by inserting the bolt 41 of the fastening member 4 into the collar 13 with the gasket 5 interposed, the case main body 2 and the lid are closed. The mountability of the gasket 5 when the body 3 is assembled is improved.

  In addition, the planar shape of the opening 11a in the through hole 11 of the collar holding portion 10 is an elliptical shape whose major axis is along the circumferential direction a of the main body 6, so that the minor axis is the circumferential direction a of the main body 6. Since the shape is along the width direction b orthogonal to, the protrusion width d of the collar holding portion 10 from the main body portion 6 can be reduced, and thus space saving can be more effectively performed. Furthermore, the elliptical shape of the through hole 11 is a shape whose short axis extends along the width direction b orthogonal to the circumferential direction a of the main body portion 6, and the width d1 of the peripheral edge portion 12 on the short axis side is the width on the long axis side. Since it is smaller than d2, the protrusion width d of the collar holding portion 10 from the main body portion 6 can be made smaller. As a result, the space can be saved more effectively. Moreover, since the width d1 of the peripheral edge portion 12 on the minor axis side is smaller than the width d2 on the major axis side, when the collar 13 is press-fitted into the through hole 11 of the collar holding portion 10, the minor axis portion of the peripheral edge portion 12 is pressed. The side portion 12b easily extends in the circumferential direction of the ellipse and becomes smaller than the width d1 of the peripheral edge portion 12 on the minor axis side, so that the protrusion width d of the collar holding portion 10 from the main body portion 6 increases due to press fitting of the collar 13. Can be suppressed.

  Further, since the collar holding portion 10 is provided with the positioning protrusion 14, the gasket 5 is properly interposed at a predetermined position between the flange portion 21 of the case body 2 and the flange portion 31 of the lid body 3. The assembling property of the case body 2 and the lid body 3 is improved, and the mounting property of the gasket 5 is further improved. Further, since the portion of the peripheral portion 12 of the collar holding portion 10 on the side of the main body portion 6 is formed wide and the positioning protrusions 14 are provided on the wide portions 12a, 12a, the through hole 11 of the collar 13 is press-fitted. It is hardly affected by the deformation, and the positional deviation of the positioning projection 14 due to this deformation is prevented, and the positioning is accurately performed. In addition, since the plurality of collar holding portions 10 are provided at intervals in the circumferential direction a of the body portion 6, the gasket 5 is evenly distributed over the entire circumference between the case body 2 and the lid body 3. Since they can be interposed in a close compressed state, the sealing function can be made uniform.

FIG. 5 shows a modification of the above embodiment. In this modification, the elliptical shape of the opening 11a of the through hole 11 in the collar holding portion 10 is different from that of the above-described embodiment. That is, the short-axis side peripheral edge portion 12 of the collar holding portion 10 on the side opposite to the main body portion 6 has a shape close to a straight shape substantially parallel to the main body portion 6 or a curved shape with a large radius of curvature, whereby the opening The elliptical minor axis of the portion 11a is configured to be shorter than the above example. More specifically, the elliptical shape of the opening 11a in this example is a line-symmetrical shape in which the minor axis is the axis of symmetry, but not the line-symmetrical shape in which the major axis is the axis of symmetry. . Therefore, since the peripheral portion 12 is also formed so as to correspond to the elliptical shape of the opening 11a, the protrusion width d of the collar holding portion 10 from the main body portion 6 can be made smaller than that in the above-described embodiment. Space saving is made more effective.
Since other configurations are the same as those in the above-mentioned example, common parts are denoted by the same reference numerals, and description of the operation and effects thereof will be omitted.

  Although the case body 2 is the first member and the lid body 3 is the second member in each of the above-described embodiments, the case body 2 may be the second member and the lid body 3 may be the first member. Also, the relationship between the second member and each component of the gasket 5 can be appropriately interchanged without departing from the scope of the claims. Further, although the first member and the second member are the constituent members of the case for accommodating the battery pack for the automobile, the present invention is not limited to this, as long as the member in which the gasket is interposed is a flat member having a planar shape, The gasket of the present invention is preferably applied. Further, the planar shape of the color holding portion 10 is not limited to the example shown in the drawing, and may be another shape. In addition, the shape of the inner surface of the through hole 11 in the collar holding portion 10 is not limited to the straight shape in the height direction as shown in the figure, and an annular protrusion that increases the fitting margin may be provided on the inner surface. . In particular, the provision of such an annular protrusion allows the gasket 5 to be stored, transported, delivered, etc. in a state where the cylindrical collar 13 having no outward flange is formed by press-fitting. It is effective in preventing the collar 13 from falling off in these processes. Further, although the first seal portion 7 and the second seal portion 8 are made of the two ridges, the present invention is not limited to this, and the ridges having other shapes or having no ridges. It may consist of a flat surface.

2 Case body (first member)
21a First surface 21b Hole 3 Lid (second member)
31a Second surface 5 Gasket 6 Main body 6b Opposing surface (one of opposing surfaces)
7 Sealing Part 10 Collar Holding Part 11 Through Hole 11a Opening Part 12 Peripheral Part 12a Wide Part 13 Color 14 Positioning Protrusion a Circumferential direction b Width direction d Projection width d1 Width of peripheral part on minor axis d2 Peripheral part major axis side Width at

Claims (7)

A gasket interposed in a compressed state between a first member and a second member that are integrated with each other,
A plane-shaped first surface of the first member and a plane-shaped second surface of the second member;
At least one of the surfaces of the main body portion facing the first surface and the second surface is provided with a seal portion elastically contacting the first surface or the second surface over the entire circumference of the main body portion,
A collar holding portion for holding a collar is integrally provided on the outer peripheral side of the main body portion so as to project in the width direction of the main body portion,
The said collar holding | maintenance part consists of a through-hole and the peripheral part which surrounds this through-hole, The gasket characterized by the above-mentioned. The gasket according to claim 1,
A gasket, wherein the planar shape of the opening of the through hole is an elliptical shape whose major axis extends along the circumferential direction of the main body. The gasket according to claim 2,
The elliptical shape of the through hole is a shape in which the short axis is along the width direction orthogonal to the circumferential direction of the main body, and the width of the peripheral edge on the short axis side is smaller than the width on the long axis side. Gasket characterized by The gasket according to any one of claims 1 to 3,
The gasket is characterized in that a plurality of the collar holding portions are provided at intervals in the circumferential direction of the main body portion. The gasket according to any one of claims 1 to 4,
A gasket, wherein a collar made of a metal ring is inserted and held in the collar holding portion. The gasket according to any one of claims 1 to 5, wherein
The gasket, wherein the collar holding portion is provided with a positioning protrusion that is inserted into a hole formed in the first surface or the second surface. The gasket according to claim 6,
A gasket characterized in that a portion of the peripheral portion of the collar holding portion on the side of the main body portion is formed wide, and the positioning protrusion is provided in the wide portion.

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